Detectives believe that the Clapham chemical attack suspect likely went into the water off Chelsea Bridge and drowned in the Thames. Afghan refugee Abdul Ezedi has not been seen since the night he allegedly hurled a toxic substance at a mother with her two children.The CCTV of the last known sighting shows him close to the bridge at just before 11.30pm last Wednesday before he is seen “leaning over railings” on Chelsea Bridge.The Metropolitan Police revealed on Friday that their main working hypothesis is that he has "gone into the water", although no body has yet been found.Scotland Yard, Commander Jon Savell said: "We have spent the last 24 hours meticulously following the CCTV, and it's our main working hypothesis that he's now gone into the water.